The product is a 1/2" diameter gun snap designed for solid countersunk rivets, with an overall length of 5¼ inches. It is a pneumatic gun snap with standard 0.401" gun fitment Diameter and used in the process of gun riveting solid rivets. This tool is essential for securely forming solid countersunk rivets with a pneumatic gun. Its size makes it ideal for areospace and vehicle maintenance and repair, as well as various other applications requiring precision and efficiency in fastening. It in excellent used condition hardly showing any wear, it could do eitha polish before use though.